Let's divide 80391425 by 31
Our goal is to divide 80391425 by 31.

Advancing to step 1:
31 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 31

Let's proceed to step 2:
If we divide 80 by 31, we get 2 and a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 18 after subtracting 62 from 80.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 31

Moving on to step 3:
183 divided by 31 is 5 with a remainder of 28.
The next digit of our result is 5. 
Result so far: 25.0
Subtract 155 from 183 to get 28.
Bring next digit (9) of the dividend behind the 28 and repeat the process: 289 / 31

On to step 4:
The number 31 fits into 289 9 times, leaving a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 259.0
Subtract 279 from 289 to get 10.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 31

Let's proceed to step 5:
When dividing 101 by 31, we get 3 with a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 2593.0
If we take 93 away from 101, we end up with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 31

Step 6:
If we divide 84 by 31, we get 2 and a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 25932.0
The remainder is 22 after subtracting 62 from 84.
Include the next digit (2) from the dividend after 22, then repeat: 222 / 31

On to step 7:
If we divide 222 by 31, we get 7 and a remainder of 5.
The next digit of our result is 7. 
Result so far: 259327.0
The remainder is 5 after subtracting 217 from 222.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 31

Moving on to step 8:
31 can be fit into 55 1 times, resulting in a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 2593271.0
Deduct 31 from 55 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 9:
240 divided by 31 is 7 with a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 2593271.7
If we take 217 away from 240, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 10:
31 can be fit into 230 7 times, resulting in a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 2593271.77
If we take 217 away from 230, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 2593271.77 with a remaining 0.013.